Electronic telephone system



April 1958 R. B. TROUSDALE 2,830,124

ELECTRONIC TELEPHONE SYSTEM Filed March 4, 1955 47 Sheets-Sheet 1 STA. 9l2

"015:5 CONNECTED ON PARTY LINES ONLY JNVE'NTOR. ROBERT B. TROUSDALE Fa e. I up?! AGENT April 1958 R. B. TROUS'DALE 2,830,124

ELECTRONIC TELEPHONE SYSTEM.

Filed March 4, 1955 47 Sheets-Sheet 2 LINK A J All LINK M2 MULTIPLE ToNEs OUT 1 POINT FIG. 14

RP I4A\ F RELEASE RELEASE 'T LINE :3, RP PULSE PULSE A54 FINDER AMPLIFIER GENERATOR ASH FCT FIGJS FIG.I7 v

\ {T In M1 IGA LG 4 NPx 5C SWITCH CONTROL LB POSITIVE UNTS FIG. 9 I POSITIVE TENS RDP Ail-A AL-A FB LINK B -/|3B EL TONES OUT BIZ MULTIPLE POINT RP I4B\ I |7B\ Rs RP RELEASE RELEASE As Z';-- 4 4 L PULSE PULSE FINDER ASl-B AMPLIFIER GENERATOR FCT y} L. IN MI fws LB MPX Sc SP POSITIVE UNITS 4- SWITCH CONTROL POSITIVE TENS LG no? ASl-B AL-B FB LG April 8, 1958 R. B. TROUSDALE I I 2,830,124

ELECTRONIC TELEPHONE SYSTEM Filed March 4, 1955 47 Sheets-Sheet 3 LINK: ALLOTTER CIRCUIT IAL TONE FIG. I2

CONNECTOR FIGS.

33-4I INCL AUXILIARY PULSE AMPLIFIER FIGQS LB ABP UNITS 2| BUSY LEAD CONVERTER a EMERGENCY SERVICE NUMBER FIGS. IO 8 II TENS D TONE TONE CONNECTOR NEG. TENS NEG. UNITS CHI 2 NECTOR BUSY AMPLIFIER FIG.|8

FINDER BUSY AMPLIFIER A ril 8,1958

R. B. TROUSDALE ELECTRONIC TELEPHONE SYSTEM Filed March 4, 1955 47 Sheets-Sheet 4 DIODE SWITCH 4 RP CPH CIZ

CPIZ

: M'Il MULTIPLEXER FROM 1 LINE I FIG.I6 cmcul'r NEGJENS CH2 CHANNEL Q PULSE TO LINE ueemmrs cmcuns MATR'X l3-Ol aolooe cPOl FIGJS swncmas I3-0l RRP RTP RINGING SUPERWPOSING RINGING BUSY RINGING sglPu DIAL TONE GENERATOR SUPPLY INTEBRUPTER GENERATOR FIG.27 FIG.26 FIG.29 FIGJI V I V was. L .L |A T9 N E RTC RRC April s, 1958 R. B. TROUSDALE ELECTRONIC TELEPHONE SYSTEM Sheets-Sheet 5 Filed March 4, 1955 47 LINK C A /I3C cII LINK I L MULTIPLE I TONES cI2 POINT I4c RP RELEASE RELEASE As UNE RA RP 1 4 i G PULSE E PULSE FINDER \il-C AMPLIFIER GENERATOR 1 III I+VII I "PX SWITCH /|6c E LB POS.UNITS sc 1 SP! POS.TEN$ CONTROL 4 LG RDP ASl-C AL-C ./25 F5 MULTIPLEXER Mpx AMPLFIER I RINGING coN rRoI. /27

RC DRIVER RC0 FIG. l4

NEG. IP05. NEG. h TENS TENS UNITS POS.UNITS M [I F r -J r RDP NTI H PTI no NUII2|3H PUIIZISH SP REGISTER TENS RING UNITS RING sANIPLi'NG RIVE AMPLIFIER AMPLIFIER PULSE A PPULSE CIRCUITS CIRCUITS AMPLIFIER 5- M 'ILSF FIG. 24 FIG.23 FIG.22 9

4 33 H II I I 3| II I I III IKSPD I ifii" 34- 32 30- N Eg'S TENS RING UNITS RING 'g'fg INPUT PULSE RED CIRCUIT TRD CIRCUIT GENERATOR /43 l R lV E FIGs. 248.30 FIG.23 FIG.22 m1 FIG.5

A ril s, 1958 Filed March 4, 1955 CON NECTOR HUNTING 8 EXECUTIVE CUT IN MARKERS FIG.25

MASTER FIG. 2|

OSCILLATOR R. B. TROUSDALE ELECTRONIC TELEPHONE SYSTEM EXECUTIVE CUT IN AMPLIFIER FIG.26

TRUNK HUNTING AMPLIFIER FIG.26

47 Sheets-Sheet e FIG.6

Abi ii 8, 1958 R. B. TROUSDALE 2,330,124

ELECTRONIC TELEPHONE SYSTEM Filed March 4, 1955 I 47 Sheets-Sheet 7 April 8, 1953- R. B. TROUSDALE 2,830,124

' Filed March 4, 1955 ELECTRONIC TELEPHONE SYSTEM 47 Sheets-Sheet 8 AUXILIARY PUL SE AMPLIFIER 2O SWITCH co TRoL ISA CD903 T930 R903 AMPLIFIER 92 LBR April 1958 A R. B. TROUSDALE 2,830,124

ELECTRONIC TELEPHONE SYSTEM Filed March .4, 1955 47 Sheets-Sheet 9 BUSY LEAD. CONVERTER 4 EMERGENCY SERVICE NUMBER CIRCUIT 2| ABP RIOO4 LBR EMITTER FOLLOWER April 8, 1958 R. B. TROUSDALE 2,330,124

v ELECTRONIC TELEPHONE SYSTEM Filed March 4, 1955 47 Sheets-Sheet 1o BUSY LEAD CONVERTER 6 EMERGENCY SERVICE NUMBER CIRCUIT 2| CDIIOI 0- N IIOI -2 STA QUARTER 1 m DECK STATION I LINE CIRCUIT noaI 2 STA EMERGENCY T 25 SERVICE Ru 0" PILOT HOUSE LINE CIRCUIT 1 STATION STATION NO. LINE CIRCUIT 222 I 0 F- 25 n05; SWITCH POSITION pus [FLU I 2" IJZRTER DECK PTZ PTO SZPILOT HOUSE I I A POS.UNIT$ EMERGENCY SERVICE NUMBER RD? SWITCH IIOO ABP couoa P MPX i ARTIFICIAL F BUSY SWlTCHES- CW0 B PU! coma PU4 o-PU5 f o-Pus o-PU? I ASPA PI) A O\ PU8 Pos.umTs l Pu9 PUO pus T UNITS as. SELECTOR IQ mo -couo? PT3 aiL 1 I I- can m i K} PTI "1 POS.TENS e2. 5 J PTZ N4 I I-' iW-K I1 I o-PT5 r o'-PTe I-M DI o-PTT o-PTB -PT9 1 PTO TENS 2 SELECTOR April 8, 1958 R. B. TROUSDALE 2,830,124

ELECTRONIC TELEPHONE SYSTEM Filed March 4, 1955 4'7 Sheets-Sheet l1 LINK ALLOTTER CIRCUIT l9 MANUAL STEP Rl2l3 4- I240 J RIZIZ CDIZII CDIZOQ CDIZIVO I RING STAGE 3 ==c|2 P 03 P azooa v lzooc IZOOA IZIOB TO mac :5 LlNE Abe FINDER nc FIG. l2

April 8, 1958 R. B. TROUSDALE ELECTRONIC TELEPHONE SYSTEM Filed March 4, 1955 4'7 Sheets-Sheet 12 LINE CIRCUIT H r ANYRIBOI GI Ha & n03

T0 DIODE SWITCH CIRCUITIIB RING v I345 c3 T0 DIODE msoz SWITCH c2 CIRCUITIIC I346 SLEEVE Mll RING TIP ISIO musms 2:2; CONTROL 3 H309 OSCILLATOR RINGING I320 CONTROL GATE I352 CPII CDI303 5 RRP RTP i L FIG. I3

April 8, 19 58 R. B. TROUSDALE 2,830,124

ELECTRONIC TELEPHONE SYSTEM 7 Filed March 4, 1955 47 Sheets-Sheet 1s All U402 A 3 TI4IO TONES RI4O6 R1402 NOTE! OUTPUTS OF ALL I00 DIODE swncu I" CIRCUITS IN LINK'A 01005 "403 CONNECT TO mess SWITCH CPI TERMINALS CONTROL cm4o4 RP -Mll RINGING CONTROL DRIVER 27 A r AMPLIFIER l42l |4|Q RI408 Rl407 Rl409 RCO li o SPI

FIG. l4 sg April 8, 1953 R. B. TROUSDALE 2,830,124

ELECTRONIC TELEPHONE SYSTEM Filed March 4, 1955 47 Sheets-Sheet 14 SPI sc CHANNEL PULSE MATRIX 26 g NTI T0 CPI2 CPIO um; {CIRCUIT Po NEG. TENS A NT2 T CP2I J3 CF22 cPzo CIRCUIT D. 2|

I I 3\ l NTO CPOI} cPo2 cPdo +NUI Huz NUO g L NEG UNITS Mll TONES OUT RP NEG.

POS.UNITS- UNITS April 8, 1958 R, B. TROUSDALE 2,830,124

' ELECTRONIC TELEPHONE SYSTEM Filed March 4, 1955 47 Sheets-Sheet 15 LG NE6.TENS NEG. UNITS MULTIPLEXER 24 AOH cmsn Rlso Cl6ll T0 E I UNE m2 Rl6l2 CD|602 cmcun W cD|6l0- clslz H msoscoleoa SP I NEGTTENS NEG.+ UNITS TONES OUT P05. UNITS NEG. TENS SP RP April 8, 1958 R. B. TROUSDALE 2,830,124

ELECTRONIC TELEPHONE SYSTEM Filed March 4, 1955 47 Sheets-Sheet 16 NEG.TEN$ NEG.UNITS MULTIPLEXER OUTPUl AMPLIFIER 25 MPX AMPLIFIER I700 canon RELEASE PULSE GENERATOR |5A ASTABLE OSCILLATOR As R|7O| 720 F132 --o ZSconoz Rrroa TONES OUT POS.UN|TS I SP RP POS.UNITS posnaus April 8, 1958 Filed March 4, 1955 -'POS.TENS

R. B. TROUSDALE ELECTRONIC TELEPHONE SYSTEM 47 Sheets-Sheet 17 MPX FIG.I

CONNECTOR BUiY AMPLIFIER 22 TIBIO- RELEASE PULSE AMPLIFIER I4A Fa 'neso L AL-A MPX LG meoz RP CDIBOI TONES OUT\ --Pos. vans POS. TENS\ 4 B VLG I RDP April 8, 1958 R. B. TROUSDALE 2,830,124

ELECTRONIC TELEPHONE SYSTEM I Filed March 4, 1955 47 SheetsSheet 18- LINE FINDER I7A REGISTER UNITS DRIVE REGISTER PULSE PULSER UNITS o gcoloa posmms L N CDI909 cmslo POS.TENS,/

CUT Rl9l8 GATE THROUG R903 AMPLIFIER R1902 Cl90 CUT "ll- THROUGH OUTPUT Rl905 g R RELEASE DELAY I930 N FG ' ALLOTTER R1907 I START |95OA AS ALLOTTER LG msos START I95OB ASl-A NFG-- I FRA- ASl-A RS- FCT April 8, 1958 R. B. TROUSDALE 2,830,124

ELECTRONIC TELEPHONE SYSTEM Filed March 4, 1955 47 Sheets-Sheet 19 TENS LINE FINDER |7A REGISTER PULSER RZOOI CD '1- TENS REGISTER c200| c2002 n 1 R2002 ll TENS 2 TENS O 2020 2030 0 E R2003 rflif g V PTI v POS.TENS PTZ @2003 PTO c2o0s= FINDER GATE AMPLIFIER 2050 R2005 FINDER T2060 PULSE GATE F .7 gm NFG FCT FIG. 2O

April s, 1958 Filed March 4, 1955 R. B. TROUSDALE ELECTRONIC TELEPHONE SYSTEM MASTER OSCILLA IOR 28 UNITS RING QRIVE 43.

RRP

47 Sheets-Sheet 2o RTP CLIPPER FIG.2I 

